I also noticed when I set fader keyframe I can't return to the same position again.

Here is how to do this. Mouse directly over the fader auto until the pointer cursor is stopped and stable as a pointer cursor (not a hairline). Then simply press and release the middle mouse button without moving. Now you will be exactly on the fader auto.

I sometimes want to walk through keyframes - in last situation I used video and audio faders .

We are going to "attempt" to add code to use a shortcut of Alt-a for next fader/speed/autos and Ctrl-a for previous auto. This should come in handy.